Builder&#39;s scaffold



July 9, 1935. G. A. SCHERNEKAU 2,007,480

BUILDERS SCAFFOLD Filed June'zo, 1934 2 Sheets-Sheet 1boooooooonaoo9oooo looooooooncooooooou ooooooooocooooooooo1.00000000000000000 0 15706772 07.- 0 Gasiw lisa'emelea,

July 9, 1935. G. A. SCHERNEKAU 2,007,480

BUILDERS SCAFFOLD Filed June 20, 1934 2 Sheets-Sheet 2 ]n can for, GusTwlascfiernekqk Patented July 9, 1935 UNITED STATES PATENT OFFICE I2,007,48d BUlLDERS soAFFoLn Gustav Schernekau, Indianapolis, Ind.Application June 26, 1934, Serial No. 731,471

11 Claims- ((31. 304-29) The object of this invention is to provide ascaffold for the use of bricklayerscarpenters, and builders generallythat will have strong .vertical members for the support ofhorizontal-platforms which areprovided with easy means for raising andlowering them, and" are provided with safety means which willavoid alldanger of the platforms falling regardless of overloads or carelessmanipulation of the raising and supporting devices. v r

The object, also, is to provide a durable, easily erected and removedscaffolding and which will' be inexpensive'to manufacture 1 I accomplishthe above and other objects which will hereinafter-appear, by themechanism illustrated in the accompanying drawings, in which- Fig. l isa vertical end elevation of my invention in operative position adjacenta brick wall under construction, the upper outer portions of thevertical supporting members being broken away to disclose the innerconstruction; v

Fig. 2 is a sideelevation of thesame scaffold structure shown in Fig. l;

Fig.3 is a fragment in vertical edge view on an enlarged scale of thehousing and contained hoisting mechanism showing some portions invertical section;

Fig. 4 is a side elevation of the parts illustrated in Fig. 3 on thesame scale as in Fig. 3;

Fig. 5 is a cross-section of one of the vertical supporting members andscaffold bracket on the lineE-B of Fig. 2; V

Fig. 6 isa detail-of the platform supporting means midway of thevertical supporting members on the line 6-45 of Fig. 2;

Fig.7 is a'section on the line 1 of Fig. 6 on a larger scale. Likecharacters of reference indicate like means in the several views of thedrawings- Inner 'scaifold supporting members or standards 8, by which ismeant those members which are nearest the wall In, under construction,and outer supporting members or standards 9, are

standards are provided with; a longitudinal series of holes M, which arerelatively close together and are staggered with relation to' the holesin the two perforated flanges of each beam. These perforated flangesfunction as rack bars to engage radial pins l5 ((see Figs. 3 and i) of awheel It. The wheel I6 is mounted on a shaft ll, which is reduced indiameter on each side of the wheel to receive split bearings 18 and [9,preferably of bronze. The bearings l8 and [9 are seated in holes in apair of sheet metal plates 26 and 2|, forming a housing which hasvertical sliding adjustment on a standard 8, or 9 as the case may be.The plates 20 and 2| are connected by four bolts 22, on each of which isa spacing sleeve 23 (see bottom of Fig. 3) and a friction roller 24, anadditional bolt 25, also carrying a spacing sleeve, is preferably used.7 a

The wheel shaft I1 is extended on one side of the housing and squared toreceive a ratchet wheel 26 next to thehousing and beyond the ratchetwheel to receive a crank (not shown) for manually rotating wheel l6 tocause the housing to travel (up or down according to the direction inwhich the crank is turned) on the standard 8.

Holes 21 are formed through both housing plates for the insertiontherethrough of a channel bar 28. This bar 28 extends across to andthrough the housing on the adjacent vertical standard. Planks 29 aresupported upon the bars 28 of two adjacent pairs of standards as shownin Fig. 2, thereby forming a loading platform on which brick and othermaterial are deposited by workmen whoas tenders stand on an outsideplatform of planks 30.

The planks 30 are supported 'on brackets formed from channel bars 3|bolted-at 32' to the housings on the standards 9.

The channel bars 31 extend down between channels of the I beam 9 therequisite distance and are then bent outwardly and upwardly to form adiagonal support 32, the outer end of which is connected with thevertical member 3| by a horizontal bar 33; each preferably formed ofsteel I beams which A workman, such as a hod carrier, reaches theplatform 30 by a ladder (not shown) in theusual manner, walks thereon tothe place where his material is wanted and dumps it upon the platform29. The platform 30 is thus raised and lowered by the travel of thehousing to which it is bolted.

A similar platform 34, for the bricklayer or other artisan, is supportedupon a like bracket 35 made out of channel bars, one end of which isbotlguad in like manner to the housing on the standar The platforms 29,30 and 34 are steadied and supported midway between the pairs ofstandards by the means illustrated in Figures 2 and 6, comprising plates31, 31, on each side of platform 29, supported from standards as 9, 9 bytruss-bars 38 and 39, the plate and two truss bars at the intersectionsof the bars are united by a bolt 40. Above the bolt 40 is a verticallyelongated hole 4| (see Fig. 7) formed with a horizontal bottom. A pipe42 passes through the hole 4| in plates on each side of the platform 29,and this pipe, at proper distances apart, has under-side notches intowhich the horizontal portions of the plate at the bottom of holes 4| areentered to keep the pipe 42 from moving longitudinally. This pipesupports the planks of platform 29 at the middle of the platform.

Passing through the pipe 42 is a 44, then horizontally by suitable pipefittings to form thesupport 45 for the platform 30. The other end ofpipe 44 is extended down and again horizontally in like manner to formthe support 46 for the platform 34.

As a safety appliance to hold a given position of the wheel I6, Iprovide a pawl 48 pivotally attached to the housing and operating withthe ratchet wheel 26 in the usual manner.

A further safeguard is provided by a pair of pawls 50 and 5| positionedon shaft 49 to press against the perforated flanges of the standard andenter appropriate ones of the holes by the action of gravity caused byweights 52, off-set from the shaft 49.

The operation of my scaffold mechanism has been so fully explained inconnection'with the above detailed description that'further explanationis deemed unnecessary.

It will be apparent that numerous modifications and rearrangements ofparts may be made without departing from the essential characteristicsof my invention.

What I claim is 1. The combination with a standard having flangesperforated in longitudinal series, of a housing comprising a pair ofparallel plates mounted on and slidable longitudinally of the standardwith the standard between the plates, a pair of friction rollers at thetop and bottom of the housing contacting both flanges of the stand ardbetween the rollers of each pair, and a wheel rotatably supported by thehousing, said wheel having radial pins successively engaging. theperforations to move the housing on the standard by the rotation of thewheel.

2. The combination with a standard having flanges with a plural seriesof perforations extending longitudinally of the standard, saidperforations being staggered in arrangement transversely of the standardof a housing comprising a pair of parallel plates mounted on andslidable longitudinally of the standard with the smaller pipe standardbetween the plates, spacing sleeves be-.

tween the plates, bolts through the plates and sleeves holding theplates against the sleeves, friction rollers on some of said sleeves, inpairs, making rolling contact with the flanges of a standard assembledbetween the pairs, anda wheel rotatably mounted in the housing, saidwheel having as many circumferential rows of radial pins as there areseries of perforations in the flanges, said pins being staggeredtransversely of the wheel to operatively engage correspondingperforations of the flanges to move the housing on thestandard by therotation of the wheel.

3. The combination with a standard having one end of which is extendeddownwardly and flanges with a plural series of perforations extendinglongitudinally of the standard, said perforations being staggered inarrangement transversely of the standard of a housing comprising a pairof parallel plates mounted on and slidable longitudinally of thestandard with the standard between the plates, spacing sleeves betweenthe plates, bolts through the plates and sleeves holding the platesagainst the sleeves, friction rollers on some of said sleeves, in pairs,making rolling contact with the flanges of a standard assembled betweenthe pairs, and a wheel rotatably mounted in the housing between upperand lower friction roller pairs, said wheel having as manycircumferential rows of radial pins as thereare, series of perforationsin the flanges, saidv pins being staggered transversely of 'the wheel tooperatively engage corresponding perforations of the flanges to move thehousing on the standard by the rotation of the wheel, means to rotatethe wheel and means to lock the wheel against movement in one direction.

4. The combination with a standard having flanges with a plural seriesof perforations extending longitudinally of the standard, saidperforations being staggered in arrangement transversely of thestandard, of a housing comprising two spaced apart plates embracingthestandard between them and slidable longitudinally of the standard, ashaft, a wheel fixed on the shaft, said shaft reduced in diameter oneach side of the wheel, split bearings with inside flanges receiving thereduced portions of the shaft and supported by the plates with theflanges against the inner sides of the plates, said wheel having as manycircumferential rows of radial pins as there .are series of perforationsin the flanges, said pins being staggered transversely of the wheel tooperatively engage corresponding perforations of the flanges to move thehousing on the standard by the rotation of the wheel, means to rotatethe wheel and automatic means to lock the wheel against movement in onedirection.

5. The combination with a standard having flanges with a plural seriesof'perforations extending longitudinally of the standard, saidperforations being staggered in arrangement transversely of thestandard, of housing comprising two spaced apart plates embracing thestandard between them and slidable longitudinally of the standard, ashaft, a wheel fixed on the shaft, said shaft reduced in diameter oneach side of the wheel, split bearings with inside flanges receiving thereduced portions of the shaft and supported by the plates with theflanges against the inner sides of the plates, said wheel having as manycircumferential rows of radial pins as there are series of perforationsin the flanges, said pins being staggered transversely of the Wheel tooperatively engage corresponding perforations of the flanges to move thehousing on the standard by the rotation of the wheel, means to rotatethe wheel and automatic means to lock the'wheel againstmovementinthedirection, comprising one or more pawls pivotally carried by the housingand weighted on one side of the pivot to press thepawl against theperforated flange to enter one of the perforations by the action ofgravity, a ratchet wheel on the shaft and a pawl pivoted to the housingand engaging the ratchet wheel to prevent lowering of the device whenboth of the first pawls are out of engagement with the perforations ofthe flange.

6. A scaffold unit comprising a pair of vertical standards each havingarack formation,

cross bars connecting the standards at their lower portions, a housingfor each standard through which the standard passes having a holethrough the housing transverse to the standards, a wheel carried'by eachhousing having formations engaging those of the rack when the wheel isrotated, means for rotating the wheels, a bar slidingly inserted throughthe holes in the housing and connecting the two housings, a loadingplatform supported at one end by the bar, a bracket suspended againstthe respective standards from each housing, workmans platform supportedat one end by one of the brackets, a tenders platform supported at oneend by the other bracket and means to prevent the accidental lowering ofthe housings.

7 In a scaffold, supporting standards in pairs, a loading platform, aworkmans platform and a tenders platform below the loading platform, .aplate on each side of the loading platform, a pair of truss bars foreach plate bolted at one of their ends to a respective plate and attheir ends to respective scaffold standards, a pipe crossing under theplatform and passing through holes in the two plates, a smaller pipepassing through the first pipe and having one end bent and extended toand under the workmans platform and the other end bent and extended toand under the tenders platform.

' 8. In a scaffold, supporting standards in pairs, a loading platform, aworkmans platform and a tenders platform below the loading platform, aplate on each side of the loading platform, .a pair of truss bars foreach plate bolted at one of their ends to a respective plate and attheir ends to respective scaffold standards, a pipe crossing under theplatform and passing through holes in the two plates, a smaller pipepassing through the first pipe and having one end bent and extended toand under the workmans platform and the other end bent and extended toand under the tenders platform, said first pipe being notched at itsends on the under side and receiving the plate at the bottom of the holein the notch to prevent the spreading apart of the plates.

9. In a platform, I beams forming vertical standards, the two flanges onone side of the I beam having a longitudinal series of holes which arestaggered transversely of the two series of each beam, a housing foreach standard comprising a pair of plates each having a hole transverseto the standards, bolts connecting the plates, spacers on the bolts andfriction rollers on the spacers making sliding contact against thestandards, a channel bar slidingly assembled in the holes of andconnecting a pair of the housings, cross bars connecting the standardpairs at their lower portions, a wheel journaled in the housing betweenthe two plates of the housing, said wheel having two rows of radial pinsstaggered to successively enter holes in the standard of that housing,means for rotating the wheels, a ratchet wheel rotating with each pinwheel, a pawl pivoted to the housing and engaging the ratchet wheel,

a platform supporting bracket carried by each housing and platformsupported at an end of each by the bracket and a loading platform by thechannel bars.

10. In a platform, I beams forming vertical standards, the two flangeson one side of the I beam having a longitudinal series of holes whichare staggered transversely of the two series of each beam, a housing foreach standard comprising a pair of plates each having a hole transverseto the standards, bolts connecting the plates, spacers on the bolts andfriction rollers on the spacers making sliding contact against thestandards, a channel bar slidingly assembled in the holes of andconnecting a pair of the housings, cross bars connecting the standardpairs at their lower portions, a wheel journaled in the housing betweenthe two plates of the housing, said wheel having two rows of radial pinsstaggered to suecessively enter holes in the standard of that housing,means for rotating the wheels, a ratchet wheel rotating with each pinwheel, a pawl pivoted to the housing and engaging the ratchet wheel, apair of pawls pivoted in the housing above the wheel and weighted toenter the holes in the standard by gravity, a platform supportingbracket suspended by each housing and sliding against its standard andplatforms supported at an end of each by the bracket and a loadingplatform by the channel bars.

11. In a platform, I beams forming vertical standards, the two flangeson one side of the I beam having a longitudinal series of holes whichare staggered transversely of the two series of each beam, a housing foreach standard comprising a pair of plates each having a hole transverseto the standards, bolts connecting the plates, spacers on the bolts andfriction rollers on the spacers making sliding contact against thestandards, a channel bar slidingly assembled in the holes of andconnecting a pair of the housings, cross bars connecting the standardpairs at their lower portions, a wheel journaled in the housing betweenthe two plates of the housing, said wheel having two rows of radial pinsstaggered to suecessively enter holes in the standard of that housing,means for rotating the wheels, a ratchet wheel rotating with each pinwheel, a pawl pivoted to the housing and engaging the ratchet wheel, apair of pawls pivoted in the housing above the wheel and weighted toenter the holes in the standard by gravity, a platform supportingbracket suspended by each housing and sliding against its standard andplatforms supported at an end of each by a bracket, and means comprisinga pair of platform spacing plates supported by truss bars from thestandards and a pipe passing through holes in the plates for supportingthe platforms at their middles said pipe being notched to engage theplates to prevent lateral movement of the plates on the pipe and spreadof the platform.

GUSTAV A. SCHERNEKAU.

